Simulation Error E5004 on previously solvable part

[dannyspitz]

Hi, 

i came back to an older part that needed an update, prior to making the update i tried to run an existing simulation to note the differential with the new mods however the simulation gave an E5004 error. The simulation always ran previously but not now. changing/replacing constraints and loads did nothing. creating a new study did nothing. even recreating the the part from a similar part that has the same features failed (for which the simulation study produces results) didn't work. \

error log from cloud solve on new part

error log 2 from local solve on orginal part

please help!

regards, 

Danny 

[ahreum.ryu]

Hi @dannyspitz, 

Thank you for posting and I'm sorry that you are having this issue. 

Let me explain about the error message at first. 

In the log file (cloud)
FATAL ERROR S1121: INVALID LICENSE FOR ANALYSIS, TRANSLATOR, OR FEATURE TYPE

Solution:
It can be some intermittent problems when running jobs in Windows 10, so try re-run the job once or twice it should complete. but we are aware of the problem and working on addressing it

In the log file 2 (Local)

FATAL ERROR E5004: STIFFNESS MATRIX SINGULAR OR NON-POSITIVE DEFINITE

Here is E5004 Error description that seems like stable issue. even though DOF view can show all green, we should check the contact information. to figure it out, do you mind sharing your model? my email address is ahreum.ryu@autodesk.com.

I look forward to your reply. 

Many thanks,

[dannyspitz]

Ahreum,



Thanks for looking into this for me.



The link to the file is http://a360.co/2ikDgwS and the password is “broken”



Regards,



Danny Spitz

[ahreum.ryu]

Hi @dannyspitz, 

Thank you for sharing your model. 

In your model, you just applied a "Fricitonless" constraint.

For static simulations, we need to prevent all rigid body motion, such as free translational and rotational movement. This process is known as making the model statically stable. To do that, we can apply a fixed constraint to a face, or combine partial constraints on faces, edges, or vertices.
A frictionless constraint prevents the surface from movement or deformation in the direction normal to the surface. the face is free to rotate, move or deform in the surface tnagential direction.
This model doesn't have a sufficient constraint it means will be unstable to solve. is there any other surface to add constraints? 

or we are able to use "Remove Rigid Body Modes" option to make a stable status.
it is difficult to constrain a model without limiting or preventing the deformation that would occur naturally. When the Remove rigid body modes option is enabled, the solver automatically applies a global acceleration load to the model. This acceleration load balances the applied loads and makes the model statically stable.
this is the detail information please take a look at that. 

I'm sending the result model. (I just enabled that option to solve) if you need more help, please let me know. 

Many thanks

Ahreum.